Celestial Atlas
(IC 3450 - 3499) ←     IC Objects: IC 3500 - 3549 Link for sharing this page on Facebook     → (IC 3550 - 3599)
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3500, 3501, 3502, 3503, 3504, 3505, 3506, 3507, 3508, 3509, 3510, 3511, 3512, 3513, 3514, 3515, 3516,
3517, 3518, 3519, 3520, 3521, 3522, 3523, 3524, 3525, 3526, 3527, 3528, 3529, 3530, 3531, 3532, 3533,
3534, 3535, 3536, 3537, 3538, 3539, 3540, 3541, 3542, 3543, 3544, 3545, 3546, 3547, 3548, 3549

Page last updated Feb 2, 2013
WORKING: Add historical, physical information

IC 3500 (= PGC 41751 = PGC 1445392)
Discovered (May 10, 1904) by
Royal Frost (958)
A 14th-magnitude spiral galaxy (type SBcd?) in Coma Berenices (RA 12 33 49.5, Dec +13 57 46)
Based on a recessional velocity of 6120 km/sec, IC 3500 is about 285 million light years away. Given that and its apparent size of 0.75 by 0.45 arcmin, it is about 60 thousand light years across. The galaxy is listed as a member (VCC 1526) of the Virgo Cluster, but is not actually a member of the Cluster, since it is much further away.
SDSS image of spiral galaxy IC 3500
Above, a 2.4 arcmin wide closeup of IC 3500
Below, a 12 arcmin wide region centered on the galaxy
SDSS image of region near spiral galaxy IC 3500

IC 3501 (= PGC 41754)
Discovered (Apr 29, 1892) by
Isaac Roberts
A 14th-magnitude lenticular galaxy (type E/S0?) in Coma Berenices (RA 12 33 51.5, Dec +13 19 21)
Apparent size 0.95 by 0.85 arcmin. Listed as a member (VCC 1528) of the Virgo Cluster.
SDSS image of lenticular galaxy IC 3501
Above, a 2.4 arcmin wide closeup of IC 3501
Below, a 12 arcmin wide region centered on the galaxy
SDSS image of region near lenticular galaxy IC 3501

IC 3502 (= SDSS J123342.33+263702.5)
Discovered (Mar 23, 1903) by
Max Wolf (4-188)
A 17th-magnitude spiral galaxy (type Sd?) in Coma Berenices (RA 12 33 42.5, Dec +26 37 04)
Apparent size 0.5 by 0.15 arcmin.
SDSS image of spiral galaxy IC 3502
Above, a 2.4 arcmin wide closeup of IC 3502
Below, a 12 arcmin wide region centered on the galaxy, also showing IC 3508
SDSS image of region near spiral galaxy IC 3502, also showing lenticular galaxy IC 3508

IC 3503
Recorded (Jun 13, 1896) by
Stephane Javelle
A 16th-magnitude star in Canes Venatici (RA 12 33 48.4, Dec +37 47 23)
Per Dreyer, IC 3503 (Javelle 1225, 1860 RA 12 26 57, NPD 51 26.9) is "extremely faint, very small, brighter middle and nucleus". The position precesses to RA 12 33 47.8, Dec +37 46 44, nearly 0.7 arcmin south of the star listed above, and even farther from anything else. Given only that, one might wonder if the position involved a substantial recording or reducing error, and referred to some completely different place. However, per Corwin, a reduction of Javelle's "measurements with respect to the AC2000.2 position for his comparison star" yields a position almost dead on the star; so it appears that there was an error in the position Javelle used for the comparison star that carried over into the position for his #1225, and once that error was removed the identification became certain.
SDSS image of region near the star listed as IC 3503
Above, a 12 arcmin wide region centered on IC 3503

IC 3504
Recorded (Nov 8, 1899) by
Arnold Schwassmann
A 15th-magnitude star in Virgo (RA 12 34 08.0, Dec +06 53 12)
Per Dreyer, IC 3504 (Schwassmann 24, 1860 RA 12 27 01, NPD 82 20.5) is "extremely faint, very small, near 10th magnitude star". The position precesses to RA 12 34 08.1, Dec +06 53 08, practically on top of the star listed above, and the 11th magnitude star just to its north confirms the identification.
SDSS image of region near the star listed as IC 3504
Above, a 12 arcmin wide region centered on IC 3504

IC 3505 (= PGC 41792)
Discovered (May 7, 1904) by
Royal Frost (960)
A 15th-magnitude spiral galaxy (type SBc?) in Coma Berenices (RA 12 34 10.3, Dec +15 58 07)
Apparent size 0.95 by 0.35 arcmin. Listed as a member (VCC 1542) of the Virgo Cluster, but much further away, so not really a member of the Cluster.
SDSS image of spiral galaxy IC 3505
Above, a 2.4 arcmin wide closeup of IC 3505
Below, a 12 arcmin wide region centered on the galaxy
SDSS image of region near spiral galaxy IC 3505

IC 3506 (= PGC 41782)
Discovered (May 10, 1904) by
Royal Frost (961)
A 15th-magnitude elliptical galaxy (type dE0?) in Virgo (RA 12 34 06.7, Dec +12 44 30)
Apparent size 0.8 by 0.8 arcmin. Listed as a member (VCC 1539) of the Virgo Cluster.
SDSS image of elliptical galaxy IC 3506
Above, a 2.4 arcmin wide closeup of IC 3506
Below, a 12 arcmin wide region centered on the galaxy
SDSS image of region near elliptical galaxy IC 3506

IC 3507 (= PGC 3089514)
Discovered (Mar 23, 1903) by
Max Wolf (4-189)
A 17th-magnitude compact galaxy (type S0/a?) in Coma Berenices (RA 12 34 04.4, Dec +25 21 48)
Apparent size 0.4 by 0.35 arcmin. There is no type listed, so that was estimated from the galaxy's appearance in the closeup image below. No recessional velocities or distance estimates currently available.
SDSS image of compact galaxy IC 3507
Above, a 2.4 arcmin wide closeup of IC 3507
Below, a 12 arcmin wide region centered on the galaxy
SDSS image of region near compact galaxy IC 3507

IC 3508 (= PGC 41774)
Discovered (Mar 23, 1903) by
Max Wolf (4-190)
A 14th-magnitude lenticular galaxy (type SAB0/a?) in Coma Berenices (RA 12 34 06.9, Dec +26 40 17)
Apparent size 0.85 by 0.7 arcmin.
SDSS image of lenticular galaxy IC 3508
Above, a 2.4 arcmin wide closeup of IC 3508
Below, a 12 arcmin wide region centered on the galaxy, also showing IC 3502 and 3514
SDSS image of region near lenticular galaxy IC 3508, also showing spiral galaxy IC 3502 and the double star listed as IC 3514

IC 3509 (= PGC 41797)
Discovered (May 10, 1904) by
Royal Frost (962)
A 14th-magnitude lenticular galaxy (type E/S0?) in Virgo (RA 12 34 11.5, Dec +12 02 58)
Apparent size 1.0 by 0.65 arcmin. Listed as a member (VCC 1545) of the Virgo Cluster.
SDSS image of lenticular galaxy IC 3509
Above, a 2.4 arcmin wide closeup of IC 3509
Below, a 12 arcmin wide region centered on the galaxy
SDSS image of region near lenticular galaxy IC 3509

IC 3510 (= PGC 41803)
Discovered (May 10, 1904) by
Royal Frost (963)
A 14th-magnitude elliptical galaxy (type E0?) in Virgo (RA 12 34 15.0, Dec +11 04 18)
Apparent size 0.85 by 0.85 arcmin. Listed as a member (VCC 1549) of the Virgo Cluster.
SDSS image of elliptical galaxy IC 3510
Above, a 2.4 arcmin wide closeup of IC 3510
Below, a 12 arcmin wide region centered on the galaxy
SDSS image of region near elliptical galaxy IC 3510

IC 3511
Recorded (Mar 23, 1903) by
Max Wolf
A 17th-magnitude star in Coma Berenices (RA 12 34 09.5, Dec +27 20 54)
Per Dreyer, IC 3511 (Wolf list IV #191, 1860 RA 12 27 13, NPD 61 52.7) is "very faint, small, irregular figure, nucleus". The position precesses to RA 12 34 10.1, Dec +27 20 57, just northeast of the star listed above. Per Corwin, a print of Wolf's plate shows the star as a faint nebula, so a small plate defect must have been involved; but the identification with the star is certain. There is a an 18th-magnitude galaxy just west of the star, but it does not appear on Wolf's plate, and has nothing to do with the IC designation.
SDSS image of region near the stars listed as IC 3511, 3512 and 3513
Above, a 12 arcmin wide region centered on IC 3511, 3512 and 3513

IC 3512
Recorded (Mar 23, 1903) by
Max Wolf
A 16th-magnitude star in Coma Berenices (RA 12 34 09.7, Dec +27 21 42)
Per Dreyer, IC 3512 (Wolf list IV #192, 1860 RA 12 27 13, NPD 61 51.9) is "very faint, small, irregular figure, nucleus". The position precesses to RA 12 34 10.1, Dec +27 21 45, just northeast of the star listed above. Per Corwin, a print of Wolf's plate shows the star as a faint nebula, so a small plate defect must have been involved; but the identification with the star is certain. See IC 3511 for an image.

IC 3513
Recorded (Mar 23, 1903) by
Max Wolf
A 16th-magnitude star in Coma Berenices (RA 12 34 11.7, Dec +27 19 51)
Per Dreyer, IC 3513 (Wolf list IV #193, 1860 RA 12 27 15, NPD 61 53.9) is "very faint, small, irregular figure, nucleus". The position precesses to RA 12 34 12.1, Dec +27 19 45, just southeast of the star listed above. Per Corwin, a print of Wolf's plate shows the star as a faint nebula, so a small plate defect must have been involved; but the identification with the star is certain. See IC 3511 for an image.

IC 3514
Recorded (Mar 23, 1903) by
Max Wolf
A 16th- and 18th-magnitude double star in Coma Berenices (RA 12 34 15.8, Dec +26 42 01)
Per Dreyer, IC 3514 (Wolf list IV #194, 1860 RA 12 27 19, NPD 62 31.7) is "very faint, very small, brighter middle, spiral". The position precesses to RA 12 34 16.5, Dec +26 41 57, just east of the double star listed above, and there is nothing else nearby save IC 3508 (which see for an image). Per Corwin, Wolf's notes include a position angle that agrees with the relative positions of the stars, confirming the identification.

IC 3515 (= PGC 1819983)
Discovered (Mar 23, 1903) by
Max Wolf (4-195)
A 15th-magnitude spiral galaxy (type Sa?) in Coma Berenices (RA 12 34 16.0, Dec +27 51 43)
Apparent size 0.75 by 0.25 arcmin.
SDSS image of spiral galaxy IC 3515
Above, a 2.4 arcmin wide closeup of IC 3515
Below, a 12 arcmin wide region centered on the galaxy
SDSS image of region near spiral galaxy IC 3515

IC 3516 (= PGC 41808)
Discovered (Mar 23, 1903) by
Max Wolf (4-196)
A 15th-magnitude spiral galaxy (type Sbc?) in Coma Berenices (RA 12 34 17.3, Dec +27 27 10)
Apparent size 1.8 by 0.15 arcmin.
SDSS image of spiral galaxy IC 3516
Above, a 2.4 arcmin wide closeup of IC 3516
Below, a 12 arcmin wide region centered on the galaxy
SDSS image of region near spiral galaxy IC 3516

IC 3517 (= PGC 41829)
Discovered (Feb 15, 1900) by
Arnold Schwassmann (117)
A 15th-magnitude spiral galaxy (type SBdm?) in Virgo (RA 12 34 30.9, Dec +09 09 18)
Apparent size 1.2 by 0.7 arcmin. Listed as a member (VCC 1566) of the Virgo Cluster.
SDSS image of spiral galaxy IC 3517
Above, a 2.4 arcmin wide closeup of IC 3517
Below, a 12 arcmin wide region centered on the galaxy
SDSS image of region near spiral galaxy IC 3517

IC 3518 (= PGC 41828)
Discovered (May 10, 1904) by
Royal Frost (966)
A 14th-magnitude lenticular galaxy (type dS0?) in Virgo (RA 12 34 31.3, Dec +09 37 26)
Apparent size 1.5 by 0.7 arcmin. Listed as a member (VCC 1567) of the Virgo Cluster.
SDSS image of lenticular galaxy IC 3518
Above, a 2.4 arcmin wide closeup of IC 3518
Below, a 12 arcmin wide region centered on the galaxy
SDSS image of region near lenticular galaxy IC 3518

IC 3519 (= PGC 41845)
Discovered (May 7, 1904) by
Royal Frost (964)
A 15th-magnitude elliptical galaxy (type dE3?) in Coma Berenices (RA 12 34 38.4, Dec +15 36 09)
Apparent size 0.8 by 0.55 arcmin. Listed as a member (VCC 1577) of the Virgo Cluster.
SDSS image of elliptical galaxy IC 3519
Above, a 2.4 arcmin wide closeup of IC 3519
Below, a 12 arcmin wide region centered on the galaxy, also showing NGC 4540 and IC 3528
SDSS image of region near elliptical galaxy IC 3519, also showing spiral galaxies NGC 4540 and IC 3528

IC 3520 (= PGC 41830)
Discovered (May 10, 1904) by
Royal Frost (965)
A 14th-magnitude irregular galaxy (type dIm?) in Coma Berenices (RA 12 34 31.7, Dec +13 30 12)
Apparent size 0.95 by 0.5 arcmin. Listed as a member (VCC 1569) of the Virgo Cluster.
SDSS image of irregular galaxy IC 3520
Above, a 2.4 arcmin wide closeup of IC 3520
Below, a 12 arcmin wide region centered on the galaxy
SDSS image of region near irregular galaxy IC 3520

IC 3521 (= PGC 41847)
Discovered (Nov 8, 1899) by
Arnold Schwassmann (26)
A 13th-magnitude spiral galaxy (type SBm pec?) in Virgo (RA 12 34 39.5, Dec +07 09 35)
Apparent size 1.6 by 1.1 arcmin. Listed as a member (VCC 1575) of the Virgo Cluster.
SDSS image of spiral galaxy IC 3521
Above, a 2.4 arcmin wide closeup of IC 3521
Below, a 12 arcmin wide region centered on the galaxy
SDSS image of region near spiral galaxy IC 3521

IC 3522 (= PGC 41865)
Discovered (May 7, 1904) by
Royal Frost (967)
A 15th-magnitude irregular galaxy (type IBm?) in Coma Berenices (RA 12 34 45.8, Dec +15 13 16)
Apparent size 1.5 by 0.7 arcmin. Listed as a member (VCC 1585) of the Virgo Cluster.
SDSS image of irregular galaxy IC 3522
Above, a 2.4 arcmin wide closeup of IC 3522
Below, a 12 arcmin wide region centered on the galaxy
SDSS image of region near irregular galaxy IC 3522

IC 3523 (= PGC 169559)
Discovered (May 10, 1904) by
Royal Frost (968)
A 17th-magnitude spiral galaxy (type Sc?) in Coma Berenices (RA 12 34 39.3, Dec +14 00 58)
Apparent size 0.4 by 0.35 arcmin.
SDSS image of spiral galaxy IC 3523
Above, a 2.4 arcmin wide closeup of IC 3523
Below, a 12 arcmin wide region centered on the galaxy
SDSS image of region near spiral galaxy IC 3523

IC 3524
Recorded (Nov 23, 1900) by
Arnold Schwassmann
A 14th-magnitude star in Coma Berenices (RA 12 34 43.0, Dec +14 14 40)
Per Dreyer, IC 3524 (Schwassmann 290, 1860 RA 12 27 39, NPD 74 59.9) is "considerably faint, small, possibly a 12.5 magnitude star". The position precesses to RA 12 34 42.7, Dec +14 13 46, an arcmin south of the star listed above, which (given the reference to a 12.5 magnitude star) is the most likely candidate for the IC object despite the positional error. As it happens most of the offset is due to Dreyer making a one arcmin blunder in converting Schwassmann's position (which was given as a 1900 RA and Dec) to the 1900 RA and NPD used in the IC, and from there to the 1860 RA and NPD used in the NGC and IC. The correct 1860 NPD was 74 58.9; using either the corrected 1860 position or Schwassmann's original position (1900 RA 12 29 40.45, Dec +14 47 50.6) yields a modern position less than 0.1 arcmin north of the star, so the identification is certain. (I greatly appreciate Dr. Corwin's providing me with Schwassmann's original notes.) Note: PGC 41859, the galaxy a little over an arcmin south of the star, is sometimes listed as IC 3524, but is far too faint for Schwassmann to have taken for a 12.5 magnitude star.
SDSS image of region near the star listed as IC 3524, also showing PGC 41859, which is sometimes misidentified as IC 3524
Above, a 12 arcmin wide region centered on IC 3524, also showing PGC 41859

PGC 41859 (not =
IC 3524)
Not an IC object but listed here since sometimes mistakenly listed as IC 3524
A 16th-magnitude elliptical galaxy (type dE2 pec?) in Coma Berenices (RA 12 34 42.7, Dec +14 13 25)
Apparent size 0.5 by 0.4 arcmin. Listed as a member (VCC 1582) of the Virgo Cluster.
SDSS image of elliptical galaxy PGC 41859, which is sometimes misidentified as IC 3524
Above, a 2.4 arcmin wide closeup of PGC 41859; for a wider view, see IC 3524

IC 3525 (= PGC 1375716)
Discovered (May 10, 1904) by
Royal Frost (969)
A 16th-magnitude spiral galaxy (type Sdm pec?) in Virgo (RA 12 34 46.4, Dec +10 10 32)
Apparent size 0.6 by 0.4 arcmin.
SDSS image of spiral galaxy IC 3525
Above, a 2.4 arcmin wide closeup of IC 3525
Below, a 12 arcmin wide region centered on the galaxy
SDSS image of region near spiral galaxy IC 3525

IC 3526
Recorded (Mar 23, 1903) by
Max Wolf
A pair of 16th- and 17th-magnitude stars in Coma Berenices (RA 12 34 40.7, Dec +25 41 04)
Per Dreyer, IC 3526 (Wolf list IV #197, 1860 RA 12 27 43, NPD 63 32.6) is "faint, very small, round, brighter middle". The position precesses to RA 12 34 40.9, Dec +25 41 03, almost exactly on the pair of stars listed above, so the identification is certain. (Corwin notes that the pair is clearly seen but appears to be only a single star on a print of Wolf's plate.)
SDSS image of region near the pair of stars listed as IC 3526, also showing the star listed as IC 3529
Above, a 12 arcmin wide region centered on IC 3526, also showing IC 3529

IC 3527
Recorded (Mar 23, 1903) by
Max Wolf
A pair of 16th-magnitude stars in Coma Berenices (RA 12 34 42.3, Dec +26 09 19)
Per Dreyer, IC 3527 (Wolf list IV #198, 1860 RA 12 27 45, NPD 63 04.2) is "faint, very small, round, brighter middle starlike". The position precesses to RA 12 34 42.6, Dec +26 09 27, just north of the brighter member of the pair of stars listed above, so the identification is certain. (As in the case of IC 3526, Corwin notes that the pair is clearly seen but appears to be only a single star on a print of Wolf's plate.)
SDSS image of region near the pair of stars listed as IC 3527
Above, a 12 arcmin wide region centered on IC 3527

IC 3528 (= PGC 41882)
Discovered (May 7, 1904) by
Royal Frost (970)
A 15th-magnitude spiral galaxy (type SAB(r)b) in Coma Berenices (RA 12 34 55.8, Dec +15 33 58)
Apparent size 0.5 by 0.45 arcmin. Listed as a member (VCC 1593) of the Virgo Cluster, but not actually a member, since much further away.
SDSS image of spiral galaxy IC 3528, also showing spiral galaxy NGC 4540
Above, a 2.4 arcmin wide closeup of IC 3528, also showing NGC 4540 (which see for a wider image)

IC 3529
Recorded (Mar 23, 1903) by
Max Wolf
A 16th-magnitude star in Coma Berenices (RA 12 34 49.8, Dec +25 41 56)
Per Dreyer, IC 3529 (Wolf list IV #199, 1860 RA 12 27 52, NPD 63 31.7) is "faint, very small, round, brighter middle". The position precesses to RA 12 34 49.8, Dec +25 41 58, right on the star listed above, so the identification is certain. (Corwin notes that the star is clearly seen on a print of Wolf's plate.) See IC 3526 for an image.

IC 3530 (= PGC 41853)
Discovered (May 7, 1904) by
Royal Frost (971)
A 14th-magnitude elliptical galaxy (type E3?) in Coma Berenices (RA 12 34 49.4, Dec +17 48 49)
Apparent size 1.3 by 0.95 arcmin.
SDSS image of elliptical galaxy IC 3530
Above, a 2.4 arcmin wide closeup of IC 3530
Below, a 12 arcmin wide region centered on the galaxy
SDSS image of region near elliptical galaxy IC 3530

IC 3531 (= PGC 3791763)
Discovered (Mar 23, 1903) by
Max Wolf (4-200)
A 15th-magnitude compact galaxy (type S0/a?) in Coma Berenices (RA 12 34 56.6, Dec +26 37 36)
Apparent size 0.25 by 0.25 arcmin.
SDSS image of compact galaxy IC 3531
Above, a 2.4 arcmin wide closeup of IC 3531
Below, a 12 arcmin wide region centered on the galaxy, also showing IC 3536
SDSS image of region near compact galaxy IC 3531, also showing spiral galaxy IC 3536

IC 3532
Recorded (Mar 23, 1903) by
Max Wolf
A pair of 17th-magnitude stars in Coma Berenices (RA 12 34 57.6, Dec +25 52 50)
Per Dreyer, IC 3532 (Wolf list IV #201, 1860 RA 12 28 00, NPD 63 20.8) is "very faint, very small, brighter middle, spiral". The position precesses to RA 12 34 57.6, Dec +25 52 52, just north of the pair listed above, so the identification is certain. (Per Corwin, this is a single object on a print of Wolf's plate; so the IC entry definitely includes both stars.)
SDSS image of region near the pair of stars listed as IC 3532
Above, a 12 arcmin wide region centered on IC 3532

IC 3533 (= PGC 41891)
Discovered (Mar 23, 1903) by
Max Wolf (4-202)
A 15th-magnitude spiral galaxy (type SB(r)a pec?) in Coma Berenices (RA 12 35 01.2, Dec +25 46 49)
Apparent size 0.45 by 0.25 arcmin.
SDSS image of spiral galaxy IC 3533
Above, a 2.4 arcmin wide closeup of IC 3533
Below, a 12 arcmin wide region centered on the galaxy, also showing IC 3535
SDSS image of region near spiral galaxy IC 3533, also showing the star listed as IC 3535

IC 3534 (= PGC 165235)
Discovered (May 7, 1904) by
Royal Frost (972)
A 15th-magnitude spiral galaxy (type SABc?) in Coma Berenices (RA 12 34 52.1, Dec +14 58 42)
Apparent size 0.45 by 0.45 arcmin.
SDSS image of spiral galaxy IC 3534
Above, a 2.4 arcmin wide closeup of IC 3534
Below, a 12 arcmin wide region centered on the galaxy
SDSS image of region near spiral galaxy IC 3534

IC 3535
Recorded (Mar 23, 1903) by
Max Wolf
A 15th-magnitude star in Coma Berenices (RA 12 35 10.9, Dec +25 43 53)
Per Dreyer, IC 3535 (Wolf list IV #203, 1860 RA 12 28 13, NPD 63 29.8) is "faint, very small, round, brighter middle". The position precesses to RA 12 35 10.6, Dec +25 43 52, right on the star listed above, so the identification is certain. (Corwin states that the star is clearly visible on a print of Wolf's plate.) See IC 3533 for an image.

IC 3536 (= PGC 41912)
Discovered (Mar 23, 1903) by
Max Wolf (4-204)
A 16th-magnitude spiral galaxy (type Sc?) in Coma Berenices (RA 12 35 12.4, Dec +26 32 00)
Apparent size 0.9 by 0.2 arcmin.
SDSS image of spiral galaxy IC 3536
Above, a 2.4 arcmin wide closeup of IC 3536
Below, a 12 arcmin wide region centered on the galaxy, also showing IC 3531 and NGC 4555
SDSS image of region near spiral galaxy IC 3536, also showing compact galaxy IC 3531 and elliptical galaxy NGC 4555

IC 3537
Recorded (Jan 23, 1900) by
Arnold Schwassmann
A 15th-magnitude star in Virgo (RA 12 35 22.5, Dec +07 39 11)
Per Dreyer, IC 3537 (Schwassmann 69, 1860 RA 12 28 16, NPD 81 34.5) is "very faint, small, questionable". The position precesses to RA 12 35 22.6, Dec +07 39 10, right on the star listed above, so the identification is certain.
SDSS image of region near the star listed as IC 3537
Above, a 12 arcmin wide region centered on IC 3537

IC 3538
Recorded (Mar 23, 1903) by
Max Wolf
A 16th-magnitude star in Coma Berenices (RA 12 35 15.6, Dec +26 14 10)
Per Dreyer, IC 3538 (Wolf list IV #205, 1860 RA 12 28 18, NPD 62 59.5) is "extremely faint, small, irregular figure". The position precesses to RA 12 35 15.3, Dec +26 14 10, almost on the star listed above, so the identification is certain.
SDSS image of region near the star listed as IC 3538, also showing spiral galaxies IC 3543 and 3546
Above, a 12 arcmin wide region centered on IC 3538, also showing IC 3543 and 3546

IC 3539
Recorded (Mar 23, 1903) by
Max Wolf
A 16th-magnitude star in Coma Berenices (RA 12 35 20.1, Dec +23 58 59)
Per Dreyer, IC 3539 (Wolf list IV #206, 1860 RA 12 28 21, NPD 65 14.7) is "extremely faint, small, round, brighter middle, 13th magnitude star to southwest". The position precesses to RA 12 35 19.5, Dec +23 58 58, practically on the star listed above, and the brighter (albeit 15th-magnitude) star to the southwest confirms the identification.
SDSS image of region near the star listed as IC 3539
Above, a 12 arcmin wide region centered on IC 3539

IC 3540 (= PGC 41936)
Discovered (Apr 29, 1892) by
Isaac Roberts
A 14th-magnitude lenticular galaxy (type E/S0?) in Virgo (RA 12 35 27.2, Dec +12 45 03)
Apparent size 0.75 by 0.75 arcmin. Listed as a member (VCC 1614) of the Virgo Cluster.
SDSS image of lenticular galaxy IC 3540
Above, a 2.4 arcmin wide closeup of IC 3540
Below, a 12 arcmin wide region centered on the galaxy
SDSS image of region near lenticular galaxy IC 3540

IC 3541
Recorded (Mar 23, 1903) by
Max Wolf
A 15th-magnitude star in Coma Berenices (RA 12 35 21.7, Dec +23 58 31)
Per Dreyer, IC 3541 (Wolf list IV #207, 1860 RA 12 28 24, NPD 65 15.2) is "extremely faint, small, round, 14th magnitude star to northwest". The position precesses to RA 12 35 22.5, Dec +23 58 29, about 0.2 arcmin east of the star listed above, but the star to the northwest confirms the identification. (There is also a 17th-magnitude star just southeast of the IC position, but Corwin states that it is not visible on a print of Wolf's plate, so it cannot be the IC object.)
SDSS image of region near the star listed as IC 3541
Above, a 12 arcmin wide region centered on IC 3541

IC 3542 (= PGC 41970)
Discovered (May 10, 1904) by
Royal Frost (973)
A 15th-magnitude spiral galaxy (type SBab(s)?) in Virgo (RA 12 35 41.2, Dec +11 40 00)
Apparent size 0.65 by 0.35 arcmin. Listed as a member (VCC 1633) of the Virgo Cluster, but not actually a Cluster member, since much further away.
SDSS image of spiral galaxy IC 3542
Above, a 2.4 arcmin wide closeup of IC 3542
Below, a 12 arcmin wide region centered on the galaxy
SDSS image of region near spiral galaxy IC 3542

IC 3543 (= PGC 41974)
Discovered (Mar 23, 1903) by
Max Wolf (4-209)
A 16th-magnitude spiral galaxy (type Sd?) in Coma Berenices (RA 12 35 41.3, Dec +26 17 12)
Apparent size 1.25 by 0.15 arcmin.
SDSS image of spiral galaxy IC 3543
Above, a 2.4 arcmin wide closeup of IC 3543
Below, a 12 arcmin wide region centered on the galaxy, also showing IC 3538, 3546, 3547 and 3553
SDSS image of region near spiral galaxy IC 3543, also showing spiral galaxy IC 3546 and the stars listed as IC 3538, 3547 and 3553

IC 3544
Recorded (Nov 23, 1900) by
Arnold Schwassmann
A pair of 15th- and 16th-magnitude stars in Coma Berenices (RA 12 35 47.4, Dec +14 18 02)
Per Dreyer, IC 3544 (Schwassmann 291, 1860 RA 12 28 44, NPD 74 55.7) is "considerably faint, very small, perhaps a 12.5 magnitude star". The position precesses to RA 12 35 47.4, Dec +14 17 59, right on the brighter of the stars listed above, so the identification is certain. (Such a close pair of stars would appear to be a single object on Schwassmann's plate, so both stars should be considered part of the IC entry.)
SDSS image of region near the pair of stars listed as IC 3544
Above, a 12 arcmin wide region centered on IC 3544

IC 3545 (=
NGC 4555 = PGC 41975)
Discovered (Apr 6, 1785) by William Herschel (and later listed as NGC 4555)
Discovered (Mar 23, 1903) by Max Wolf (and later listed as IC 3545)
A 12th-magnitude elliptical galaxy (type E3?) in Coma Berenices (RA 12 35 41.0, Dec +26 31 26)
Per Dreyer, IC 3545 (Wolf list IV #211, 1860 RA 12 28 44, NPD 62 42.3) is "pretty bright, small, round, brighter middle". The position precesses to RA 12 35 41.0, Dec +26 31 23, right on the galaxy, so the identification is certain. The duplicate listing is odd, as Wolf's position is essentially identical to the one for NGC 4555 (which see for images), but per Corwin, Wolf put the NGC number on a faint galaxy (presumably PGC 1777936) two arcmin south of the correct one, and must have thought the brighter galaxy was a new discovery. The nearly identical position and description should have alerted Dreyer to the duplication, but they didn't, so here we are.

PGC 1777936
Not an IC object but listed here due to its historical relationship to
IC 3545
A 16th-magnitude lenticular galaxy (type S0/a?) in Coma Berenices (RA 12 35 41.4, Dec +26 28 57)
(As noted in the entry for IC 3545, that IC listing was the result of Max Wolf incorrectly marking PGC 1777936 as NGC 4555 on his plate of the region. If not for that, this entry would be placed on the appropriate PGC page.) Apparent size 0.45 by 0.2 arcmin.
SDSS image of lenticular galaxy PGC 1777936
Above, a 2.4 arcmin wide closeup of PGC 1777936
Below, a 12 arcmin wide region centered on NGC 4555, also showing PGC 1777936
SDSS image of region near elliptical galaxy NGC 4555, also showing lenticular galaxy PGC 1777936

IC 3546 (= PGC 41976 = "NGC 4565B")
Discovered (Mar 23, 1903) by
Max Wolf (4-212)
A 15th-magnitude spiral galaxy (type Sc?) in Coma Berenices (RA 12 35 41.6, Dec +26 13 21)
Apparent size 0.95 by 0.55 arcmin.
SDSS image of spiral galaxy IC 3546
Above, a 2.4 arcmin wide closeup of IC 3546
Below, a 12 arcmin wide region centered on the galaxy, also showing IC 3538, 3543 and 3553
SDSS image of region near spiral galaxy IC 3546,also showing spiral galaxy IC 3543 and the stars listed as IC 3538 and 3553

IC 3547
Recorded (Mar 23, 1903) by
Max Wolf
A 17th-magnitude star in Coma Berenices (RA 12 35 48.8, Dec +26 19 46)
Per Dreyer, IC 3547 (Wolf list IV #214, 1860 RA 12 28 52, NPD 62 53.9) is "very faint, very small, irregular figure". The position precesses to RA 12 35 49.0, Dec +26 19 47, right on the star listed above, so the identification is certain. (Per Corwin, Wolf's description stated that the object was a little extended at 70, so there may have been a small plate defect also involved; but if so it doesn't show up well on a print of the plate, while the star is clearly visible.)
SDSS image of region near the stars listed as IC 3547 and 3549, also showing spiral galaxy IC 3543
Above, a 12 arcmin region centered between IC 3547 and 3549, also showing IC 3543

IC 3548 (= PGC 42001)
Discovered (May 10, 1904) by
Royal Frost (974)
A 15th-magnitude elliptical galaxy (type dE4?) in Virgo (RA 12 35 56.5, Dec +10 56 09)
Apparent size 0.8 by 0.5 arcmin Listed as a member (VCC 1647) of the Virgo Cluster.
SDSS image of elliptical galaxy IC 3548
Above, a 2.4 arcmin wide closeup of IC 3548
Below, a 12 arcmin wide region centered on the galaxy
SDSS image of region near elliptical galaxy IC 3548

IC 3549
Recorded (Mar 23, 1903) by
Max Wolf
A 16th-magnitude star in Coma Berenices (RA 12 35 50.9, Dec +26 23 44)
Per Dreyer, IC 3549 (Wolf list IV #216, 1860 RA 12 28 54, NPD 62 49.9) is "very faint, very small, brighter middle, spiral". The position precesses to RA 12 35 51.0, Dec +26 23 47, right on the star listed above, so the identification is certain. (See IC 3547 for an image.)
Celestial Atlas
(IC 3450 - 3499) ←     IC Objects: IC 3500 - 3549     → (IC 3550 - 3599)